just a dead ball foul which would have not been enforced as the time of the game was over.

My only question is that if a non-player went Woody Hayes on a player (as a head coach he punched a Clemson player after he intercepted a pass in a game with tOSU), during the play, it' sounds like it would be a dead ball foul and not stop the play. If time was out, then the game would be over. That would mean if you ran on the field and tackled a guy running for a TD yourself, you would win the game for your team. Is my logic correct?